Point-of-Load (POL) converters and DC-DC converters serve similar functions in power distribution but differ in their placement within electronic equipment. POL converters are positioned directly at the load, allowing for efficient voltage regulation close to the component requiring power. This trend is increasingly adopted in modern designs, where small, high-efficiency DC-DC buck converters are utilized to manage various voltage rails fed from a central, well-regulated AC-DC or DC-DC power supply unit (PSU). This method enhances overall efficiency by minimizing voltage drop and power loss across the PCB.
PREREQUISITESElectrical engineers, power electronics designers, and anyone involved in optimizing power supply systems in electronic devices will benefit from this discussion.
I remember reading an article that Google re-engineered there servers to run on 12V power supplies, supposedly to improve efficiency by a small amount. I remember wondering how they would get the chips to work, if they had to re-engineer those too. Point-of-Load regulation seems more like what might have been done, you think that's a plausible explanation for what I read?davenn said:Hi Rama
ok they are basically the same thing :) its just their positioning in the equip that is the difference
I have noticed this more and more on gear I service ... instead of the PUS's being centrally placed and voltages distributed all over the board/s.
The trend now is to place small hi efficiency DC-DC buck converters right at the POL.
All the buck converters (with their various voltage rails) are all fed from a central higher voltage and well regulated AC-DC ( or DC-DC in the case of portable gear) PSU.
the final regulation is done on the PCB right at the point of load instead of off board or at the far end of a larger PCB.
cheers
Dave